Chopped strand, made of E-glass fiber and chopped strand of 3, 6, 12mm in length are produced by collimating the continuous fibers into strands and winding the strands into an intermediate package for subsequent chopping in a separate operation. Surfaces of monofilaments are specially coated with a suitable sizing compatible with polyester resin system. It degignation refers to a high performance, silane-based sizing that is chopped strand, will provide good composite properties in polyester molding compounds applications. CS341 is ideally suited for both injection molded and compression molded BMC.